Most Helpful Guy
wow. this is a really upsetting story. sorry to hear about your ordeal, I can't imagine it's easy.
I think the first thing you need to really try and figure out is if you can get out of that living situation. it just sounds stressful and not really condusive the type of environment that is necessary for your recovery. Of course the medications and medical help you get is vital but I think a peaceful homelife is also very necessary and it doesn't seem like you are capable of getting this here.
The guy you're staying with sounds very VERY selfish and considering what you are going through and his lack of general empathy is disappointing. Saying you want to help someone through a situation is one thing but his actions speak louder than his words.
You're right you can't count on him to be there for you but you should tell him about the pregnancy anyway as it is his responsibility as well.
If you can raise the child on your own go for it, but otherwise you may need to consider alternatives like adoption or something like that... but again if you can raise the child on your own and it's what you want to do then you should do that